<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>

</head>
<style>
    body{
        margin: 0;
        padding: 0;
    }
    #header{
        position: absolute;
        top: 0;
        background-color: #7ecef3;
        height: 10%;
        width: 100%;
    }
    #footer{
        position: absolute;
        bottom: 0;
        background-color: #7ecef3;
        height: 10%;
        width: 100%;
    }
    #ss{
        position: absolute;
        top: 10%;
        bottom: 10%;
        background-color: pink;
        height: 80%;
        width: 100%;
        /*margin: 0;*/
        /*padding: 0;*/
    }

    #left{
        position: absolute;
        width: 200px;
        height: 100%;
        left: 0;
        background-color: #89c997;
    }
    #right{
        position: absolute;
        width: 200px;
        height: 100%;
        right: 0;
        background-color: #89c997;
    }
    #content{
        /*注意不要给宽度*/
        position: absolute;
        height: 100%;
        left: 200px;
        right: 200px;
        background-color: #53b9be;
    }
</style>
<body>
<div id="header"></div>
<div id="ss">
    <div id="left"></div>
    <div id="content"></div>
    <div id="right"></div>
</div>
<div id="footer"></div>


<script>


</script>
</body>
</html>